390001431 has 4 divisors (see below), whose sum is σ = 520001912. Its totient is φ = 260000952.

The previous prime is 390001393. The next prime is 390001463. The reversal of 390001431 is 134100093.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 390001431 - 2¹¹ = 389999383 is a prime.

It is a super-2 number, since 2×390001431² = 304202232364095522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 390001398 and 390001407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390001531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65000236 + ... + 65000241.

It is an arithmetic number, because the mean of its divisors is an integer number (130000478).

Almost surely, 2^390001431 is an apocalyptic number.

390001431 is a deficient number, since it is larger than the sum of its proper divisors (130000481).

390001431 is a wasteful number, since it uses less digits than its factorization.

390001431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130000480.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 390001431 is about 19748.4538888491. The cubic root of 390001431 is about 730.6152510027.

The spelling of 390001431 in words is "three hundred ninety million, one thousand, four hundred thirty-one".